81results about "Sludge drying" patented technology

Methods of biosolids processing disclosed herein may be configured in a two-stage process. The methods include the step of distributing biosolids in an input state onto a first thermal floor disposed within a first greenhouse, the first thermal floor adapted to transfer heat to the biosolids from a working fluid communicated through the first thermal floor thereby transforming the biosolids from the input state into a first processed state at a first stage of the two-stage process. The method includes the step of distributing the biosolids in the first processed state onto a second thermal floor disposed within a second greenhouse and then heating the biosolids thereby transforming the biosolids from the first processed state into a second processed state at a second stage of the two-stage process by heating the biosolids. Apparatus that functions to implement the methods are also disclosed.

A moisture content control method during an airflow drying process includes: comparing a reference moisture content of a product with a real-time moisture content of a material to obtain a first error, where the reference moisture content is a moisture content indicator of the product; obtaining a temperature fine-tuning value based on the first error; predicting a compensation temperature based on real-time detected intake and exhaust temperatures, and the real-time moisture content of the material, which is a theoretical exhaust temperature predicted in advance based on real-time operating conditions; adding the temperature fine-tuning value and the compensation temperature to obtain a reference temperature; adjusting a rotation speed of a feeding mechanism based the reference temperature to regulate the real-time moisture content; and repeating the above five steps. This moisture content control method can overcome the time lag in the airflow drying process and improve the accuracy of moisture content control. A control system for executing the moisture content control method is also provided.

The invention relates to a method for drying moist material (1), in particular in the form of sewage sludge, using a drying system, wherein the moist material (1) is fed via a feed line (2) of the drying system to a feed unit (3) of the drying system, fed by the feed unit (3) onto a drying surface (4) of the drying system, and dried there. According to the invention, it is proposed that during the feeding of the moist material (1) in the area of ​​the feed line (2) and / or the feed unit (3), a parameter dependent on the water content of the moist material (1) passing the sensor (5) is monitored, and that the quantity of moist material (1) fed per unit of time onto the drying surface (4) by the feed unit (3) is continuously regulated taking this parameter into account. Furthermore, a drying system for drying moist material is proposed.

The invention relates to thallium-containing wastewater treatment equipment which comprises a treatment pond provided with a water outlet pipe, a circular material collecting disc is arranged at the bottom in the treatment pond, the top of the side wall of the material collecting disc is turned outwards to form a circle of bent part, the side wall of the bent part is of a net-shaped structure, a sealing plate is arranged at the top of the bent part, and a water outlet pipe is arranged at the bottom of the sealing plate. The sealing plate is connected with a convex block below the bent part through a mounting rod, a rack driven by a driving mechanism is arranged on the sealing plate, a cleaning mechanism located right above the interior of the opening of the material collecting disc is further arranged at the top of the treatment pond and comprises a cylinder driven by a motor I, a circle of groove is formed in the bottom of the cylinder in a surrounding mode, and the motor I is connected with the motor I; the side wall of the cylinder is provided with a drainage hole communicated with the interior of the groove, the two sides of the bottom of the cylinder are provided with a scraping plate and a collecting assembly respectively, the bottom of the material collecting disc is provided with a round hole used for the cylinder to penetrate through, and the round hole is sealed through a sealing mechanism. Sediments can be conveniently collected and are prevented from being discharged together with liquid to block the water outlet pipe.

A centrifugal pellet dryer system includes a centrifugal dryer, a blower to generate counter-current airflow across the centrifugal dryer, damper(s), moisture sensor(s), airflow sensor(s), processor(s), and a memory. The processor(s) continuously monitor (i) the airflow across the centrifugal dryer via the airflow sensor(s), (ii) the moisture level of the pellets via the moisture sensor(s), (iii) a blower motor load, and (iv) a centrifugal dryer motor load. The processor(s) determine whether the airflow falls below a predetermined threshold, and responsive to such determination, automatically initiate a water and / or air spray to reduce fines within the centrifugal dryer. The processor(s) continuously compare the moisture level of the pellets to predetermined threshold(s), and dynamically adjust the damper(s) and / or the blower motor load, thereby adjusting the moisture level of the pellets. The processor(s) continuously determine whether the slurry requires additional or less water, and automatically adjust water to the slurry based on such determination.

The present application relates to the technical field of sludge drying, and discloses a sludge low-temperature drying device, which comprises a pretreatment box and a drying box, a conveying mechanism, an air supply mechanism and a dehumidification mechanism are arranged in the drying box, the drying box comprises a feeding port and a discharging port, the conveying mechanism is used for conveying sludge at the feeding port end to the discharging port end, the conveying mechanism comprises a conveying belt, a first material guide and a second material guide, the conveying belt comprises a first conveying section and a second conveying section, the first conveying section is located below the feeding port, the first material guide is arranged on the first conveying section and is used for guiding sludge on the first conveying section to the second conveying section, and the second material guide is arranged on the second conveying section and is used for guiding sludge on the second conveying section to the discharging port. The present application is used for solving the problem that in the prior art, a plurality of conveying belts need to be arranged in the drying box so as to cooperate with the overturning mechanism to overturn the sludge, and the cost is high.

The invention relates to the technical field of drying, and discloses a scraper roller drying device and method. The drying roller is rotationally connected to the mounting frame and comprises a first side face and a second side face, and the first side face and the second side face are the surfaces on the two sides of the longitudinal symmetry face of the drying roller correspondingly. The first guniting pipe is installed on the installation frame, and a plurality of first guniting holes are formed in the side wall of the first guniting pipe and correspond to the first side face. The second guniting pipe is installed on the installation frame, and a plurality of second guniting holes are formed in the side wall of the second guniting pipe and correspond to the second side face. The scraping end of the scraper abuts against the second side face, and the first guniting pipe, the scraper and the second guniting pipe are sequentially arranged in the rolling direction of the drying roller. According to the scraper roller drying device and method, the drying efficiency is improved.

The present invention relates to a drying apparatus for evaporating volatile constituents from a starting material to be dried, to a process for producing an isocyanate using this drying apparatus and to the use of the drying apparatus for drying distillation bottoms streams, oil-containing waste, waste paint or coating materials, sewage sludges, mineral substances and coal slurries contaminated with organic compounds. In the drying apparatus the evaporated constituents (vapours) are passed into a condenser via a vapor dome and a vapor conduit. The drying apparatus has the feature that partial condensation of the vapours in the vapor dome and / or in the vapor conduit is intentionally allowed or induced during operation, and condensed constituents of the vapours are discharged from the drying apparatus via means installed for this purpose in the vapor dome and / or the vapour conduit.

A system for preparing fertiliser, comprising: a dry matter concentrator 10 (e.g., fluid bed drier) configured to receive manure, slurry, digestate and / or sludge F and to increase the dry matter content thereof; and a scrubber system 20 configured to receive off gases A from dry matter concentrator, with the scrubber system configured to create a scrubbing liquor B from the off gases, and to mix the liquor with the manure, slurry, digestate and / or sludge. The scrubber system may remove ammonia from off-gases, and / or receive a reagent for chemically binding ammonia into the scrubbing liquor. The system may comprise a pressurisation unit to increase scrubbing liquor pressure, and / or flow regulation device to regulate scrubbing liquor flow. Also disclosed is a method for preparing fertiliser, comprising: receiving offgases from the dry matter concentrator; creating scrubbing liquor from off gases; and mixing the scrubbing liquor with manure, slurry, digestate or sludge. The system and methods aim to increase the nutrient content of fertiliser products.

Method for the treatment of sewage sludge (2) which at the beginning of the process has a dry matter content in the range of 30 to 75 wt.%, comprising: a) Feeding the sewage sludge (2) into a pelletizing unit (3) with a motor-driven press (4), b) Pelletizing the sewage sludge (2) with the pelletizing device (3) to produce pellets (5), c) Transferring the pellets (5) obtained in step b) to a drying device (6), d) Drying the pellets (5) in the drying device (6) so that the pellets (5) have a dry matter content of at least 80 wt.% after drying.

The invention relates to an efficient synergistic sludge treatment device, and relates to the technical field of sludge treatment.The sludge treatment device comprises a sludge treatment line, and the sludge treatment line comprises a sludge feeding mechanism, a sludge dewatering mechanism, a relay conveying mechanism, a drying mechanism and a sludge discharging mechanism which are sequentially communicated; a heat medium supply mechanism; an air supply mechanism; the air preheating mechanism, the heating medium supply mechanism, the drying mechanism and the air preheating mechanism are sequentially communicated, and the heating medium supply mechanism is used for outputting a heating medium and enabling the heating medium to sequentially flow through the drying mechanism and the air preheating mechanism; the air supply mechanism, the air preheating mechanism and the drying mechanism are sequentially communicated, and the air supply mechanism is used for outputting air and enabling the air to sequentially flow through the air preheating mechanism and the drying mechanism; the air preheating mechanism is used for conducting heat exchange between a heating medium and air. And the tail gas purification mechanism communicates with the drying mechanism. The heat energy utilization rate in the sludge treatment process can be increased, and the operation energy consumption can be reduced.

A plant for treating organic material, having a reactor configured to dry organic material and a closure device (9) operating on a loading channel (6) for feeding material into the reactor. The closure device is designed to interact with material located at the outlet mouths (7) of the loading channel using separation elements (11). According to further aspects, the system may include an active filter (34) on a gas exhaust duct (30) that directs moisture-rich gases outside the reactor. In addition, the plant may be equipped with one or more suspension systems (57) that connect a frame (56) supporting the reactor to an angular position sensor (59), enabling translational movement of the sensor (59) relative to the frame. In other aspects, a process for treating organic material is provided, which involves loading the material into the reactor in a differentiated manner across two or more zones (3a) within the reactor (2).

Method and apparatus for carbonizing sludge with organic content, wherein a pre- dried sludge is processed and the material is moved in a closed space till carbonization, and the major part of water content thereof is removed mostly by heating until the solid content of the material has reached at least 85 v%, then the materiel is fed into the carbonizer reactor (16) being a rotated double-walled container, and the material is passed twice along the carbonizer reactor (16) in opposite directions at a temperature between 450°C and 600 °C in an oxygen free environment in the presence of nitrogen, wherein the generated biogases are lead out, and used in part for the heating of the reactor and in part for the drying, and the hot air generated in the carbonizer reactor is used for drying, and the bio coal obtained in the reactor is cooled and processed either as bio fertilizer or as a heating material.

A process and a plant for treating organic material, having a reactor configured to dry organic material and a closure device (9) operating on a loading channel (6) for feeding material into the reactor. The closure device is designed to interact with material located at the outlet mouths (7) of the loading channel using separation elements (11). According to further aspects, the system may include an active filter (34) on a gas exhaust duct (30) that directs moisture-rich gases outside the reactor. In addition, the plant may be equipped with one or more suspension systems (57) that connect a frame (56) supporting the reactor to an angular position sensor (59), enabling translational movement of the sensor (59) relative to the frame. In other aspects, treating organic material is provided, which involves loading the material into the reactor in a differentiated manner across two or more zones (3a) within the reactor (2).

Disclosed is a continuous centrifugal dewatering device including an external case having an internal space, a feed supply pipe to which a slurry as a mixture of a solid and a liquid is supplied, a basket provided inside the external case, a plurality of holes formed in the basket, a pusher plate provided inside the basket and configured to discharge a slurry cake attached to an inner circumferential surface of the basket to the outside of the external case, a non-contact seal configured to prevent the first gas from flowing into a space between the external case and the basket, and a gas inlet to which a second gas, which flows in a reverse direction with respect to a flow direction of the first gas flowing to the space between the external case and the basket, is supplied.

A material drying plant using superheated steam includes a downwardly open chamber with an inlet for the material to be dried, an outlet for dried material to be dried, an inlet for superheated steam and an outlet for a vapour, a conveying system for introducing the material into the chamber, transporting the material in the chamber, during drying, and discharging the dried material from the chamber, a vapour compressor for compressing a first portion of the vapour recirculated from the chamber and a heat exchanger for transferring heat from the compressed first portion by condensing a volume flow of the compressed first portion supplied to the heat exchanger. A vapour atmosphere is formed in an upper region of the chamber, which vapour atmosphere floats on ambient air located in a lower region of the chamber, wherein a transition layer is formed between the upper region and the lower region.

The invention relates to copper-containing sludge treatment, in particular to copper-containing sludge flameless combustion treatment equipment and a continuous feeding method thereof. The copper-containing sludge flameless combustion treatment equipment comprises a smoldering furnace, the top of the smoldering furnace is provided with a continuous feeding mechanism, the continuous feeding mechanism comprises a mounting frame, a sludge storage hopper and a telescopic rotating unit, and the mounting frame is arranged at a feeding port in the top of the smoldering furnace; the sludge storage hopper is mounted in the middle section of the mounting frame, a feeding hole is formed in the top of the sludge storage hopper, and the lower end of the sludge storage hopper is opened and butted with the feeding hole; the telescopic rotating unit is mounted at the top of the mounting frame and penetrates through the sludge storage hopper to extend into the smoldering furnace, and the lower end of the telescopic rotating unit is sequentially connected with a distributing sealing cone and a rotary homogenizer; the material distribution sealing cone can seal the feeding hole when the telescopic rotating unit ascends, and simultaneously drives the sludge in the sludge storage hopper to ascend so as to prevent smoldering flue gas from leaking; when the telescopic rotating unit descends, the material distribution sealing cone can uniformly discharge materials, and the rotary material homogenizer can crush the materials and flatten the sludge at the feeding hole.

The invention relates to the technical field of drying and resource utilization of livestock and poultry manure, biogas residues and sludge after granulation, and discloses a waste perishable organic pollutant resource utilization drying reduction machine which is characterized in that an electric heating layer is arranged on the bottom layer, a conveying mechanism is arranged on the middle layer, and a feeding hopper and a water vapor discharging mechanism are arranged on the top layer. And the conveying mechanism in the middle layer is designed to be in a modularized splicing mode, so that the required yield can be adapted only by adjusting and increasing or decreasing the heating power and the number of conveying layers under the condition that the occupied area is not changed. The number of the conveying mechanisms is odd so as to guarantee that feeding and discharging are in two different directions, the upper conveying mechanism and the lower conveying mechanism which are adjacent are designed in a staggered mode in the longitudinal direction and are opposite in movement direction, so that materials conveyed on the upper layer can be automatically turned over when being conveyed to the lower layer, the materials can be evenly heated, and water vapor can be emitted. The retention time of dried material particles in the machine is consistent, the drying effect and the drying uniformity are improved, and the dehydration and drying reliability of the materials is improved.

A system for dewatering a material comprising a slitter, wherein the slitter receives the material, separates the material into a plurality of clumps, and deposits the plurality of clumps of material substantially evenly on a conveyor belt. The conveyor belt is partially porous to allow water to pass through but preventing material from passing through. The conveyor belt is operable to convey the material from the slitter to a compression zone; the compression zone comprises at least one high pressure press. The compression plates engages the material positioned on the conveyor belt. At least one knife positioned proximate the at least one compression plate operable to remove material from the bottom surface of the at least one compression plate after a compression cycle; and at least one drain positioned under the conveyor belt to carry water removed from the material away from the conveyor belt.

Provided is a continuous centrifugal dewatering device including an external case having an internal space, a feed supply pipe to which a slurry as a mixture of a solid and a liquid is supplied, a basket provided inside the external case, configured to receive a first gas and the slurry provided thereto and rotate to apply centrifugal force to the slurry, a plurality of holes formed in the basket and configured to discharge a liquid filtered from the slurry to the outside of the basket, a pusher plate provided inside the basket and configured to discharge a slurry cake attached to an inner circumferential surface of the basket to the outside of the external case, a non-contact seal configured to prevent the first gas from flowing into a space between the external case and the basket, and a gas inlet to which a second gas, which flows in a reverse direction with respect to a flow direction of the first gas flowing to the space between the external case and the basket, is supplied.

A solid feces treater includes a dehydrator extracting a liquid component from first solid feces to produce second solid feces, a dryer evaporating a liquid component of the second solid feces to produce third solid feces, and a combustor burning the third solid feces, wherein the second solid feces have a solid content of about 25 % to about 30 %, and the third solid feces have a solid content greater than or equal to about 90 % and less than about 100 %.

A sludge treatment unit provided in a sludge cycling device for recycling sludge discharged from a food waste treatment device and configured to treat the sludge introduced from the food waste treatment device includes a housing having a plurality of perforations to discharge water from inside to outside thereof, a sludge input hole provided in the housing to pass through from the outside to the inside of the housing to receive the sludge, a dehydrated sludge outlet provided at a side different from the sludge input hole to discharge dehydrated sludge, and a shaft having a shaft body portion provided inside the housing and a spiral blade provided on an outer circumferential surface of the shaft body portion, the shaft being rotated by a rotational force received from a motor to move the sludge from the sludge input hole toward the dehydrated sludge outlet.

The invention relates to a method for controlling a drying plant (1), in particular a sewage sludge drying plant, for drying moist material (2), especially sewage sludge, in which the moist material (2) is fed into a drying chamber (5) of the drying plant (1) via an inlet (3) and in which the at least partially dried material (2) is discharged from the drying chamber (5) via an outlet (4). Furthermore, the amount of water evaporated per unit time during the drying of the moist material (2) is determined. In addition, the amount of moist material (2) fed into the drying plant (1) per unit time is increased or decreased, taking into account the determined amount of water evaporated per unit time. The invention also relates to the drying plant (1).

A multi-functional slurry processing system (“VARCOR”) and associated methods is disclosed. The present examples provide a multi-functional slurry processing system incorporating systems and methods for separating liquid and solid components in slurries. In particular the systems and methods described herein produce clean water, dried solids, and potential concentration of desirable constituents with a boiling point lower than water. At least one example of the multi-functional slurry processing system provides a self-contained processing facility configured to efficiently convert high water-content slurries into its constituent solid and liquid fractions and subsequently generating and collecting clean water and concentrating desirable constituents with a boiling point lower than water. The multi-functional slurry processing system advantageously applies thermodynamic principles in a system which may include various combinations of a preheater, a degassing unit, a dryer, a steam filter, a compressor, a concentrating tower, and a condensation unit.

The application relates to the technical field of granulation and drying of livestock and poultry manure, biogas residue and sludge, and discloses a drying and quantity-reducing machine for resource utilization of waste perishable organic pollutants, wherein the bottom layer of the drying and quantity-reducing machine is arranged as an electric heating layer, the middle layer is arranged as a conveying mechanism, and the top layer is arranged with a feeding hopper and a water vapor discharging mechanism. The conveying mechanism of the middle layer is designed as a modular splicing mode, so that the required output can be adapted by only adjusting the heating power and the conveying layer number without changing the floor area. The conveying mechanism is arranged as an odd number to ensure that the feeding and discharging are in two different directions. The upper and lower two conveying mechanisms are designed to be staggered in the longitudinal direction and have opposite movement directions, so that the material conveyed by the upper layer is automatically turned over when being transferred to the next layer, the material can be uniformly heated and water vapor is uniformly emitted, the residence time of the dried material particles in the machine is consistent, the drying effect and the drying uniformity are improved, and the material dehydration drying reliability is improved.

A hot gas generator (1) having a longitudinal axis (L) comprises a burner (2), a combustion chamber (3) which is encased by an axially running flame tube (4), an axially running, tubular generator casing (8) which encases the flame tube (4), wherein a swirl channel (9) is formed between the generator casing (8) and the flame tube (4), and a feed line (14) for a gas to be heated, which feed line opens into a feed section (16) of the swirl channel (9). The feed section (16) extends over the entire width (Z) of the feed line (14) running in the axial direction. The generator casing (8) runs spirally around the longitudinal axis (L) in the feed section (16) such that the swirl channel (9) tapers in the feed section (16) starting from the feed line (14) and running around the flame tube (4).

The present invention discloses a drying device, which relates to the technical field of wet coal slime drying. The drying device includes a material storage bin, a preheating mechanism, a drying mechanism and a waste heat recovery mechanism. The preheating mechanism includes a first heat exchange component and a first bin, the first bin is communicated with the material storage bin, and the first heat exchange component can heat the materials in the first bin; it includes a drying bin and a heating component, the drying bin is communicated with the first bin, and the heating component can heat the materials in the drying bin; it includes a ventilation duct and a second heat exchange component, the ventilation duct is communicated with the drying bin, the heat extraction end of the second heat exchange component extends into the ventilation duct, and the heat release end of the second heat exchange component is heat exchange-connected with the first heat exchange component. This drying device can recover the waste heat after drying coal slime and preheat the coal slime, saving energy.

The present invention provides a drying apparatus. The apparatus includes a first, upper chamber comprising a freezing section; and a second, lower chamber comprising a thawing section and a drying section. The first, upper chamber further includes an inlet and first conveying means arranged to convey material through and within the freezing section. The second lower chamber includes second conveying means arranged to convey material through and within the thawing section, and third conveying means arranged to convey material through and within the drying section. A first outlet is provided in the drying section through which dried material exits the apparatus. Generally, the material provided to be dried by the drying apparatus is alum sludge.

A dehydrator for treating organic materials or organic waste. The dehydrator has a series of fan, cooling, and heating devices to regulated the temperature during the process and to maximize the efficiency of the treatment. A system for thermal treatment of organic materials is provided. The system comprises a dehydration tank which comprises an inner container adapted to receive the organic materials to be thermally treated, an outlet allowing vapors and gases present in the inner container to exit and an outer hollow area. The system further comprises a thermal regulator in fluid communication with the outer hollow area, a thermal oxidation chamber in fluid communication with the outlet of the dehydration tank and the thermal regulator.